Cleanup of directory view right click menus. Also now checks if target path exists on rename

src/directories.cc

@@ -216,12 +216,19 @@ Directories::Directories() : Gtk::TreeView(), stop_update_thread(false) {
     EntryBox::get().entries.emplace_back(menu_popup_row_path.filename().string(), [this, source_path](const std::string &content){
       bool is_directory=boost::filesystem::is_directory(*source_path);
       
-      boost::system::error_code ec;
       auto target_path=source_path->parent_path()/content;
+      
+      if(boost::filesystem::exists(target_path)) {
+        Terminal::get().print("Error: could not rename to "+target_path.string()+": already exists\n", true);
+        return;
+      }
+      
+      boost::system::error_code ec;
       boost::filesystem::rename(*source_path, target_path, ec);
-      if(ec)
+      if(ec) {
         Terminal::get().print("Error: could not rename "+source_path->string()+": "+ec.message()+'\n', true);
-      else {
+        return;
+      }
       update();
       select(target_path);
       
@@ -252,7 +259,6 @@ Directories::Directories() : Gtk::TreeView(), stop_update_thread(false) {
           if(new_language_id!=old_language_id)
             Terminal::get().print("Warning: language for "+target_path.string()+" has changed. Please reopen the file\n");
         }
-        }
         
         EntryBox::get().hide();
       }
@@ -313,11 +319,15 @@ Directories::Directories() : Gtk::TreeView(), stop_update_thread(false) {
             update();
             Notebook::get().open(target_path);
           }
-          else
+          else {
             Terminal::get().print("Error: could not create "+target_path.string()+'\n', true);
+            return;
           }
-        else
+        }
+        else {
           Terminal::get().print("Error: could not create "+target_path.string()+": file already exists\n", true);
+          return;
+        }
         
         EntryBox::get().hide();
     });